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(No Mo deL); 2 Sheets- Sheet 1;

- J. F W'EB-STER. RIVETING-MAGHINE.

Noi 357,294. PatentedFeb. 8, 1887* lilo/.21

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2 Sheets-Sheet 2.

(No Model.)

J. F; WEBSTER. RIVETING MACHINE.

N0."35" 7,294. Patented'Feb. s, 1887.

n u w m s m I UNITED STATES PATENT 'QFFICE.

JOHN F. WEBSTER, OF SPRINGFIELD, OHIO, ASSIGNOR TO THE CHAMPION BAR ANDKNIFE COMPANY, OF SAME PLACE.

MACHINE.

SPECIFICATION forming part of Letters Patent No. 357,294, dated February8, 1887.

Application filed January 25, 1886. Serial No. 189.562.

To all whom it may concern:

Be it known that I, JOHN F. WEBSTER, a citizen of the United States,residing at Springfield, in thecounty of Clark and State of Ohio, 5 haveinvented certain new and useful Improvements in RivetingMachines, ofwhich the followingis aspecilication.

My invention relates to riveting-machines; and the object of myinvention is to provide [O a riveting-machine particularly adapted forriveting together the sections and knife-backs to form harvester knivesor sickles. ficulties heretofore experienced in attempting to performthis operation by machinery have [5 been to upset the rivet sufficientlyto fill out the hole through which it passes, and at the same time toform a proper head on the rivet without breaking the sections. Thesections, as it is well known, are first provided with the Qrivet-holes, and then hardened, after which they are riveted to theknife-backs. In order that the sections may not workloos'e by constantwear thereon, it is essential that the rivet be upset or expandedsufficiently to fill out the Q hole through which it passes, and it isalso essential'that a sufficient head be formed thereon to hold thesectionsfrom pulling off. That class of riveting-machines in which theriveting is done by a succession of quick blows has been foundunsatisfactory for this purpose, because a head is frequently formed onthe rivet before it is properly expanded or upset to fill the hole, sothat the sections soon work loose. So, also, those machines in which theriveting is done 5 at a single stroke by a heavy pressure such asthe'hydraulic, steam,or pneumatic riveting- 1nachineshave been foundunreliable, as it is difficult to regulate the pressurethereonsufficient to expand and'head the rivet without breaking the section.

culties by the use of a positive-motion reciprocating press, incombination with a yielding or elastic cushion, whereby a positive anduniform and at the same time a'yielding press- 5 ure is applied to eachrivet. I also provide meansfor varying the length of the stroke of thereciprocating press in relation to the rivetsupporting device, and alsomeans for guiding and holding the sections with the rivets therein .50during the process of riveting.

My invention consists in the constructions The dif I overcome thesediffi- (No model.)

and combinations of parts, hereinafter described and claimed,

In the accompanying drawings, Figure l is a side elevation view of amachine .to which my invention has been applied. Fig. 2 is a planvie'w.of the table of the same,'showing the guiding and holding devices.Fig. 3 is a partial front elevation of the same, showing the table andthe reciprocating press. 4 to 11, inclusive, are detailed views of someof the various parts.

In said drawings, A represents the main frame, B the table thereon, andO the reciprocating slide or press.

Extending through the top of the frame, in a suitable bearing, is ashaft, D, which. is pro-. Vided at-its forward end with a crank, D,journaled in a sliding bearing. D, in the reciprocating press 0. Theshaft D is provided 7 o at the rear with a suitable clutch mechanism, bymeans of which it may be connected to or disconnected from continuouslyrevolving mechanism, whereby it may be revolved at will; a foot-lever,E,extending to a convenient point under the table B, being preferablyemployed for operating the clutching mechanism.

The reciprocating press 0 is provided at its lower end with aclampingdevice, C, by means of which the hammer or riveting-tool a is se- 83cured in place. Supported on the,table B, immediately under theriveting-tool a, is the anvil F, on which the knife, with the rivetstherein, is supported during the process of riveting.

The anvil F is made in two parts, b and-c, the lower one, o, of which isrecessed out at c, leaving bearings c c" at either side, respectively,on which the upper part, b, or anvil proper, issupported. The upperpart, b, or anvil proper, is made of steel tempered to the proper degreeof hardness, and beingsupported at the ends only is adapted to yieldunder any undue pressure exerted thereon.

- Hinged to the anvil F, at the rear, is a 5 clampinglever, (2, providedwith an opening,

d, therein and adapted to be forced down I against the knife to beriveted, and thus'clamp the same against the anvil, the riveting-toolbeing adapted to pass through the opening 01. Ioo

This clamping-lever is connected to the reciprocating press or slide Gbymeans of aspringconnection, F, (see Figs. 10 and 11,) which is adaptedto be compressed as the slide is moved downward, thus pressing theclamping-lever against the anvilF. The spring-connection F is preferablymade in two parts, (I and d", between which parts the spring (1" islocated. These parts (1 and d are connected together in such a mannerthatapushing strain thereon causes the parts to telescope together, thusbringing the pressure on the spring (1; but when a pulling strain isapplied the strain is relieved from the spring after a limited movementand the parts move positively together. By this means the clamping-leveris forced toward the anvil with a yielding pressure as the pressaccomplishes the forward portion of the stroke, but is drawn positivelyaway from the anvil as the press recedes.

On either side of the main tableB are auxiliary supporting-tables H andH, respectively.

1 One of these supporting-tables is provided on the rivets projectingthrough the back.

the sections, back, and rivets are held in their relative positions asthe knife is slipped longitudinally across the anvil F. This preliminarywork is preferably accomplished by boys, two boys being thus employed toprepare the knives for one machine. The operator now i takes the knifeand slides it longitudinally along until the first rivet rests on theanvil proper, b. The reciprocating slide or press 0 is then caused todescend by the operator pressing down on the footlever E. As the slidedescends the clamping-lever is forced by the spring-connection F againstthe section, thus holding it firmlyin place. The riveting-tool, beingsecured in the reciprocating press 0, which is operated by the crank D,is forced positively down against the rivet to the limit of its stroke,and then reciprocates to its normal position. As it descends it comes incontact with the rivet and. compresses the same just enough to fill outthe hole through which it passes and to form a suflicient head thereon.As the riveting-tool is withdrawn the clamping-lever is raisedpositively by the slide and the knife is advanced until the other rivetin the section and one of the rivets in the next succeeding section arebrought under the riveting-tool. The tool is again caused to descend,thus upsetting and heading both rivets ata single stroke. This operationis repeated, two rivets being operated on at each stroke, until all thesections are properly secured. Vith a little experience the operatorlearns to time the movement of the knife with the strokes of the press,so that the motion of the reciprocating press is continueduninterruptedly until the knife is finished.

It is obvious that the spring-connection between the slide 0 andclamping-lever d may be dispensed with, if desired, and theclampinglever operated by hand. In this case the lever is preferablyconnected to astationary spring, as shown in Fig. 1, by which the saidlever is raised out of the way when released by the operator.

Means are furnished for varying the distance between the anvil and theriveting-tool when at the limit of its stroke, so that the rivet will becompressed to exactly the right degree. This may be accomplished byproviding an cecentric bearing, D in the slide D for the crank D, asshown in Fig. 3, this eccentric bearing being adapted to be turned todifferent positions, and held by a series of serrations surrounding itsouter edge. thus raising orlowering the press 0 in relation to the crankD; or the same result may be obtained by raising or loweringthe anvil bymeans of asuitable handscrew, J, passing up through the table 13, asshown in Fig. 1. By this means the exact compression necessary can besecured to properly expand andhead the rivet. Any slight variation inthe thickness of the sections or knife-backs or in the size of therivets will be compensated for by the yielding of the anvil proper, sothat the operation of riveting up the sections of a knife may be quicklyand accurately performed without breaking the sections. It is obviousthat the same result would be obtained by making the anvil rigid andproviding an elastic connection for the rivetingtool or thereciprocating press. This could be accomplished as shown in Figs. 4, 6,and 7, in which a spring-plate, f, is used between the riveting-tool andthe reciprocating press 0. Other modified forms of this feature may beused which will readily suggest themselves to the mind of an ordinarymechanic.

The machine as above described is particularly adapted for riveting upharvester knives or sickles, though it is obvious that it may be usedwith equally good results for other similar purposes.

Having thus described my invention, I claim- 1. The combination, with apositive reciprocating press having a riveting-tool therein and a tableunder said press, of an anvil secured on said table, said anvil being soconstructed and supported that it is adapted to yield under an unduepressure of said press, substantially as and for the purpose set forth.

2. In a riveting-machine, the combination, with the reciprocating press,of the rivetingtool therein, a yielding anvil adapted to receive thepressure of said press, a table under said tool, and an auxiliarysupporting-table provided with a guide having an overhanging flangethereon, substantially as described.

3. The combination, with the positive reciprocating press, of the tableunder said press, an elastic anvil adapted to receive the pressure ofsaid press, and a clamping device on said table adapted to hold the Workin thereon, substantially as set forth.

oiprocating press having a riveting tool therein, of a table under saidpress, a yielding or elastic anvil on said table, and a hinged 15posit-ion I clamping-lever adapted to mark the pointof I riveting andhold the Work in position, sub- 4.- The combination, with a positiverecipstantially as and for the purpose set forth.

rocating press having a riveting-tool therein, In testimony whereof Ihave hereuntoset of a table under said press, and an anvil on said myhand this 22d day of January, A. D. 1886. 20

table, said anvil being made in two parts, one JOHN F. WEBSTER.

of which is adapted to yield under the pressure of said press,substantially as specified.

5. The combination, with the positive re- Witnesses:

P. J. CLEVENGER, PAUL A. STALEY.

